Plural Conversion Stages Patents (Class 455/22)
  • Patent number: 11924147
    Abstract: A decentralized communication device is provided that facilitates optimal positioning and orientation of one or more antennas for wireless communication with external devices. The decentralized communication device includes one or more master components and one or more slave components. The master and the slave components are physically separate and communicate wirelessly. In some embodiments the slave acts as a carrier frequency translator between the master and an external wireless device, where it communicates with the external device using a first frequency and communicates with the master using a second frequency which is different from the first frequency. In another embodiment the slave has most or all the physical layer to do the digital coding, digital modulation, data framing, data formatting and data packetization for communicating with an external device, in which case digital coding and digital modulation is distributed between the master and the slave.
    Type: Grant
    Filed: April 7, 2023
    Date of Patent: March 5, 2024
    Assignee: GOLBA LLC
    Inventor: Mehran Moshfeghi
  • Patent number: 11757482
    Abstract: A frontend circuit includes a wide-band filter, a transmit filter, and switches. The wide-band filter passes both the receive frequency band of a first communication frequency band and that of a second communication frequency band which is close to or overlaps that of the first communication frequency band. The transmit filter passes the transmit frequency band of the first or second communication frequency band. The switches are capable of simultaneously bringing, into conduction, at least two of multiple filters including the wide-band filter and the transmit filter. In carrier aggregation using the receive frequency bands of the first and second communication frequency bands, the switches simultaneously bring the wide-band filter and the transmit filter into conduction. Thus, in carrier aggregation using signals of multiple communication frequencies simultaneously in communication, attenuation of signals due to signal leakage in two receive frequency bands, which are close to each other, is suppressed.
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: September 12, 2023
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hiroyuki Nagamori, Akio Kaneda, Hiroshi Muranaka, Hideki Tsukamoto, Daisuke Ito, Kiwamu Sakano, Daisuke Miyazaki
  • Patent number: 11695467
    Abstract: A device includes a primary sector and secondary sectors communicatively coupled to the primary sector. The processor included in the primary sector is configured to down convert a Radio Frequency (RF) signals with a first frequency to an analog baseband (IQ) signal with a second frequency, and receive a second digital baseband signal that comprises a first digital baseband signal and a digital echo signal. The first digital baseband signal comprises a training sequence signal. Further, the processor estimates a plurality of filter taps of the FIR filter based on the digital echo signal and estimate the digital echo signal in the received second digital baseband signal based on the first digital baseband signal and the plurality of filter taps of the FIR filter. The estimated digital echo signal is removed from at least one current digital baseband signal based on the down conversion of the RF signals.
    Type: Grant
    Filed: July 13, 2022
    Date of Patent: July 4, 2023
    Assignee: Movandi Corporation
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 11664884
    Abstract: A device includes a primary sector and secondary sectors communicatively coupled to the primary sector. The processor included in the primary sector is configured to down convert a Radio Frequency (RF) signals with a first frequency to an analog baseband (IQ) signal with a second frequency, and receive a second digital baseband signal that comprises a first digital baseband signal and a digital echo signal. The first digital baseband signal comprises a training sequence signal. Further, the processor estimates a plurality of filter taps of the FIR filter based on the digital echo signal and estimate the digital echo signal in the received second digital baseband signal based on the first digital baseband signal and the plurality of filter taps of the FIR filter. The estimated digital echo signal is removed from at least one current digital baseband signal based on the down conversion of the RF signals.
    Type: Grant
    Filed: July 13, 2022
    Date of Patent: May 30, 2023
    Assignee: Movandi Corporation
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 11616564
    Abstract: A device includes a primary sector and secondary sectors communicatively coupled to the primary sector. The processor included in the primary sector is configured to down convert a Radio Frequency (RF) signals with a first frequency to an analog baseband (IQ) signal with a second frequency, and receive a second digital baseband signal that comprises a first digital baseband signal and a digital echo signal. The first digital baseband signal comprises a training sequence signal. Further, the processor estimates a plurality of filter taps of the FIR filter based on the digital echo signal and estimate the digital echo signal in the received second digital baseband signal based on the first digital baseband signal and the plurality of filter taps of the FIR filter. The estimated digital echo signal is removed from at least one current digital baseband signal based on the down conversion of the RF signals.
    Type: Grant
    Filed: July 13, 2022
    Date of Patent: March 28, 2023
    Assignee: Movandi Corporation
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Kartik Sridharan, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 11153049
    Abstract: A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals, the apparatus comprises an encoder for encoding service data corresponding to each of a plurality of data transmission path, wherein each of the data transmission path carries at least one service component, a frame builder for building at least one signal frame included in a super frame, wherein each of signal frames includes the encoded service data and the encoded signaling data, a modulator for modulating the at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme, wherein each of the modulated signal frame includes a preamble having basic transmission parameters, wherein a length of the preamble is extendable and a transmitter for transmitting the broadcast signals carrying the at least one modulated signal frame.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: October 19, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Byounggill Kim, Jaehyung Kim, Woosuk Ko, Sungryong Hong
  • Patent number: 10432372
    Abstract: A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals, the apparatus comprises an encoder for encoding service data corresponding to each of a plurality of data transmission path, wherein each of the data transmission path carries at least one service component, a frame builder for building at least one signal frame included in a super frame, wherein each of signal frames includes the encoded service data and the encoded signaling data, a modulator for modulating the at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme, wherein each of the modulated signal frame includes a preamble having basic transmission parameters, wherein a length of the preamble is extendable and a transmitter for transmitting the broadcast signals carrying the at least one modulated signal frame.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: October 1, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Byounggill Kim, Jaehyung Kim, Woosuk Ko, Sungryong Hong
  • Patent number: 10236921
    Abstract: A signal booster device comprises a first antenna for communicating with a mobile and a second antenna for communicating with a base station. A signal path connects the antennas to each other. The signal booster device comprises a downlink amplifier, an uplink amplifier and a first downlink power detector for detecting a downlink signal power. The signal booster device comprises a bypass line for directly electrically connecting the first antenna to the second antenna and a control unit configured to obtain a measurement value from the first downlink power detector. The control unit is configured to enable the bypass line if the measurement value of the downlink signal power oversteps a first limit value so that the signal booster device switches from normal operation mode into bypass mode. The downlink amplifier and the uplink amplifier are electrically disconnected from the respective first antenna and second antenna if the bypass line is enabled.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: March 19, 2019
    Assignee: Kathrein Automotive GmbH
    Inventor: Steffen Kohlhepp
  • Patent number: 10177806
    Abstract: A system is disclosed, comprising: a wireless fronthaul access point coupled to a radio mast and in communication with a remote baseband unit, the wireless fronthaul access point further comprising a first millimeter wave wireless interface; and an antenna-integrated radio for providing access to user equipments (UEs), mounted within line of sight on the radio mast with the wireless fronthaul access point, the antenna-integrated radio further comprising: a second millimeter wave wireless interface configured to receive the digital I and Q signaling information from the remote baseband unit wirelessly via the wireless fronthaul access point, wherein the wireless fronthaul access point thereby wirelessly couples the remote baseband unit and the antenna-integrated radio.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: January 8, 2019
    Assignee: Parallel Wireless, Inc.
    Inventors: Steven Paul Papa, Rajesh Kumar Mishra
  • Patent number: 9941951
    Abstract: Provided is an interference cancellation relay device. The interference cancellation relay device includes: an interference cancellation unit cancelling an interference signal from an input signal and outputting the input signal from which the interference signal is removed; a gain control unit controlling a gain of an output signal of the interference cancellation unit; and a pre-distortion unit distorting the output signal of the interference cancellation unit, of which the gain is controlled by the gain control unit.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: April 10, 2018
    Assignee: SOLiD, INC.
    Inventors: Inho Jang, Hyunchae Kim
  • Patent number: 9838176
    Abstract: A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals, the apparatus comprises an encoder for encoding service data corresponding to each of a plurality of data transmission path, wherein each of the data transmission path carries at least one service component, a frame builder for building at least one signal frame included in a super frame, wherein each of signal frames includes the encoded service data and the encoded signaling data, a modulator for modulating the at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme, wherein each of the modulated signal frame includes a preamble having basic transmission parameters, wherein a length of the preamble is extendable and a transmitter for transmitting the broadcast signals carrying the at least one modulated signal frame.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: December 5, 2017
    Assignee: LG ELECTRONICS INC.
    Inventors: Byounggill Kim, Jaehyung Kim, Woosuk Ko, Sungryong Hong
  • Patent number: 9230771
    Abstract: A method of forming a hermetically sealed electrodless lamp envelope includes: (1) forming an envelope blank; (2) depositing a gas and light generating expedient material in an interior of the envelope blank; (3) arranging a window on an open end of the envelope blank; and (4) using an ultra-short pulse laser system to locally heat the axial end of the envelope blank and the window to seal the window on the envelope blank without degrading the contents deposited in an interior of the envelope or damaging or cracking the envelope blank and/or window.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: January 5, 2016
    Assignee: Rayotek Scientific, Inc.
    Inventor: William Raggio
  • Patent number: 9042853
    Abstract: Various embodiments provide for systems and methods for signal conversion of one modulated signal to another modulated signal using demodulation and then re-modulation. According to some embodiments, a signal receiving system may comprise an I/Q demodulator that demodulates a first modulated signal to an in-phase (ā€œIā€) signal and a quadrature (ā€œQā€) signal, an I/Q signal adjustor that adaptively adjusts the Q signal to increase the signal-to-noise ratio (SNR) of a transitory signal that is based on a second modulated signal, and an I/Q modulator that modulates the I signal and the adjusted Q signal to the second modulated signal. To increase the SNR, the Q signal may be adjusted based on a calculated error determined for the transitory signal during demodulation by a demodulator downstream from the I/Q modulator.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: May 26, 2015
    Assignee: Aviat U.S., Inc.
    Inventors: Emerick Vann, Yen-Fang Chao, Youming Qin, Roland Matian
  • Patent number: 8973060
    Abstract: There is provided a method where a terminal amplifies an MBS signal that the terminal receives using a terminal in an MBS service, transmits the amplified signal to another terminal and controls it in order to overcome the fact it is not possible to provide high quality contents over a broad area due to interference signals between MBS zones, a terminal is used as a repeater at MBS transmission time only, and an output of a repeating signal of the terminal is controlled so that an excessive interference signal for another MBS area is not generated when the terminal operates as a repeater.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: March 3, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventor: Young-Il Kim
  • Publication number: 20140378047
    Abstract: Various embodiments provide for systems, methods, or apparatuses that provide a fronthaul architecture that facilitates high fidelity and low latency communication between a radio processing unit, such as a baseband unit (BBU), which may be located a central office (CO), and a remote transceiver, which may comprise a remote radio head (RRH) or a remote radio unit (RRU), which may be located at remote cell site.
    Type: Application
    Filed: June 20, 2014
    Publication date: December 25, 2014
    Applicant: Aviat U.S., Inc.
    Inventor: Paul A. Kennard
  • Patent number: 8892026
    Abstract: An outdoor satellite receiving unit (ODU) receives several independent satellite signals, selects two signals with a switch matrix, downconverts the two signals to a bandstacked signal with a high and a low band signal, and outputs the bandstacked signal on the same cable to receiver units. Several satellite signals can be selected in groups of two or more and output to independent receiver units. Signal selecting is performed at the received radio frequency (RF) and bandstacking is performed with a single downconversion step to an intermediate frequency (IF). Channel stacking on the same cable of more than two channels from several satellites can be achieved by using frequency agile downconverters and bandpass filters prior to combining at the IF output. A slow transitioning switch minimizes signal disturbances when switching and maintains input impedance at a constant value.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: November 18, 2014
    Assignee: Entropic Communications, Inc.
    Inventors: Branislav Petrovic, Dale Hancock, Jeremy Goldblatt, Keith Bargroff
  • Patent number: 8718018
    Abstract: A user equipment (UE) is provided which reduces uplink signaling overhead in the process of reporting inter-frequency measurement results over a RACH. For measurement reporting, the UE receives an SIB including a cell information list for non-used frequency cells and a threshold from an RNC, compares signal strengths of signals received from the non-used frequency cells with the threshold, and acquires at least one inter-frequency cell ID indicating at least one non-used frequency cell having signal strength exceeding the threshold from the cell information list. The at least one inter-frequency cell ID is included in a RACH message as measurement result information for the at least one non-used frequency cell, and transmitted to the RNC. The RNC determines that the cell corresponding to the inter-frequency cell ID has signal strength exceeding the threshold.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: May 6, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyeong-In Jeong, Gert Jan Van Lieshout, Himke Van Dervelde, No-Jun Kwak
  • Patent number: 8681685
    Abstract: According to a detailed embodiment of the invention, the RS implements the following operations by using each of M shift parameter groups: Based on M shift parameters in the group, shifting respectively M decoded bit streams and merge the M shifted bit steams to get a check bit stream. Consequently M check bit streams are obtained by using M shift parameter groups. Then the RS transmits M check bit streams to the BS. The BS has received the M uplink signals from mobile terminals before and makes the M check bit streams as the check information of those uplink signals in order to check them better and reduce error rate. By adopting the method and device proposed by the invention, it is ensured in the low SNR regime error user rate or error block rate is more ideal in multi-user detection in the BS.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: March 25, 2014
    Assignee: Alcatel Lucent
    Inventors: Jun Li, Mingli You
  • Patent number: 8665845
    Abstract: A network element for a wireless communication system is locatable to couple at least one base station to an antenna array. The network element comprises at least one receiver arranged to receive a radio frequency signal from the at least one base station or the antenna array and modem logic operably coupled to the at least one receiver. The modem logic comprises radio frequency conversion circuitry arranged to down-convert a received radio frequency signal to a baseband signal; analogue-to-digital conversion logic arranged to convert the baseband signal to digitized signals; and beam-form processing logic arranged to perform active beam-forming adjustment on the digitized signals.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: March 4, 2014
    Assignee: Socowave Technologies Limited
    Inventors: Conor O'Keeffe, Joe Moore
  • Patent number: 8660057
    Abstract: A decentralized communication device is provided that facilitates optimal positioning and orientation of one or more antennas for wireless communication with external devices. The decentralized communication device includes one or more master components and one or more slave components. The master and the slave components are physically separate and communicate wirelessly. In some embodiments the slave acts as a carrier frequency translator between the master and an external wireless device, where it communicates with the external device using a first frequency and communicates with the master using a second frequency which is different from the first frequency. In another embodiment the slave has most or all the physical layer to do the digital coding, digital modulation, data framing, data formatting and data packetization for communicating with an external device, in which case digital coding and digital modulation is distributed between the master and the slave.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: February 25, 2014
    Assignee: Golba, LLC
    Inventor: Mehran Moshfeghi
  • Patent number: 8457215
    Abstract: A receiver suppresses noise simultaneously using a noise suppressor and an automatic gain controller (AGC). The receiver divides a received signal into an audio period and a non-audio period, analyzes whether the noise characteristic of the non-audio period corresponds to a non-static noise or a static noise, and if the noise characteristic corresponds to the static noise, analyzes whether the static noise is caused by a network or a transmitter side terminal. In accordance with the analyzed noise characteristic, the noise suppressor firstly suppresses the noise by determining the noise suppressing intensity, and sends a signal, from which the noise has been firstly suppressed, to the AGC. The AGC secondly suppresses the noise included in the signal. In this case, the threshold value of the AGC is controlled in real time in accordance with the noise characteristic.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: June 4, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Beak-Kwon Son, Sang-Ki Kang, Dong-Won Lee
  • Patent number: 8422436
    Abstract: A method for forwarding data in forwarding networks includes: acquiring a signal transmitted from a source node to a target node in the forwarding network; selecting an antenna which is closest to the target node or a subordinate forwarding node, according to a corresponding relationship between antennas and nodes in coverage areas of the antennas; sending the signal to the antenna selected through wire transmission media; and transmitting the signal by the antenna selected. An apparatus for forwarding data and a forwarding network are disclosed as well.
    Type: Grant
    Filed: June 20, 2007
    Date of Patent: April 16, 2013
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Shulan Feng
  • Patent number: 8391779
    Abstract: A repeater converts a frequency of a received signal based on a local oscillating frequency and transmits a transmitting signal of a frequency that is different from the frequency of the received signal. Here, the local oscillating frequency includes a local oscillating error that may be different in a plurality of repeaters. Accordingly, the repeater cancels the local oscillating frequency error itself in a frequency conversion so that transmitting frequencies between the plurality of repeaters may be identical.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: March 5, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ho Min Eum, Hyoung Soo Lim, Yong Tae Lee, Heung Mook Kim, Jong Soo Lim
  • Patent number: 8320828
    Abstract: In a multiuser MIMO system, entire system throughput achieved during retransmission is significantly enhanced. When an interference signal addressed to another user equipment (UE2) 200b has been demodulated successfully, a user equipment (UE1) 200a holds the demodulated data pertaining to the interference signal, and feeds back ACK information about the UE2 and CQI information achieved after elimination of the interference signal to a radio base station (BS) 100. When the UE2 performs retransmission after ended in a receiving failure and when the UE1 has demodulated the interference signal addressed to the UE2 successfully, the BS changes the distribution of communication resources in such a way that communication resources for the UE2 become larger than those for the UE1.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: November 27, 2012
    Assignee: Panasonic Corporation
    Inventors: Tomohiro Imai, Masayuki Hoshino, Yasuaki Yuda, Katsuhiko Hiramatsu
  • Patent number: 8315558
    Abstract: Partner relay systems and methods are provided in which relaying is performed by a pair of partner relays. Signals received from a base station are translated by a first of the pair of partner relays to a different transmission resource for communication between the pair of partner relays, and then upon reception by a second of the pair of partner relays, the signal is translated back to the original transmission resource and re-transmitted towards the receiver.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: November 20, 2012
    Assignee: Apple Inc.
    Inventors: David Falconer, Shalini Periyalwar, Koon Hoo Teo, Mo-Han Fong
  • Patent number: 8306472
    Abstract: A repeater having different input and output frequencies converts a signal received with the input frequency to a first intermediate frequency signal based on a local oscillating frequency for intermediate frequency conversion, and converts the first intermediate frequency signal to a second intermediate frequency signal by performing digital processing on the first intermediate frequency signal. Then, the repeater generates a first frequency tone signal that corresponds to a difference between the input and output frequencies, and generates a second frequency tone signal from the local oscillating frequency for intermediate frequency conversion and the first frequency tone signal. The repeater up-converts the second intermediate frequency signal to the output frequency based on the second frequency tone signal, and transmits the signal.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: November 6, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hyoung Soo Lim, Ho Min Eum, Sung Ik Park, Jae Hyun Seo, Yong Tae Lee, Yong Hoon Lee, Sung-Hoon Kim, Heung Mook Kim, Jong Soo Lim, Soo In Lee
  • Patent number: 8270897
    Abstract: A communication control method, for a radio communication system including a radio base station, a radio terminal, and a relay station that receives a radio signal transmitted from the radio base station and relays the radio signal to the radio terminal at a transmission frequency different from a reception frequency, includes broadcasting information on one or more transmission frequencies of radio base stations or relay stations from the radio base station; and determining, by the radio terminal, whether transmission-source identification information included in the radio signals that are received before and after switching the reception frequency match, the switching being conducted based on the information broadcasted from one of the radio base station directly and via the relay station, wherein if the radio terminal determines that the transmission-source identification information matches, the radio terminal omits a terminal registering procedure after frame-synchronization with the radio communication
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: September 18, 2012
    Assignee: Fujitsu Limited
    Inventor: Naoki Oguchi
  • Patent number: 8270365
    Abstract: A user equipment (UE) is provide which reduces uplink signaling overhead in the process of reporting inter-frequency measurement results over a RACH. For measurement reporting, the UE receives an SIB including a cell information list for non-used frequency cells and a threshold from an RNC, compares signal strengths of signals received from the non-used frequency cells with the threshold, and acquires at least one inter-frequency cell ID indicating at least one non-used frequency cell having signal strength exceeding the threshold from the cell information list. The at least one inter-frequency cell ID is included in a RACH message as measurement result information for the at least one non-used frequency cell, and transmitted to the RNC. The RNC determines that the cell corresponding to the inter-frequency cell ID has signal strength exceeding the threshold.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: September 18, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyeong-In Jeong, Gert Jan Van Lieshout, Himke Van Dervelde, No-Jun Kwak
  • Patent number: 8244173
    Abstract: A radio frequency repeater is provided. A donor antenna transmits a signal to and receives a signal from a base station. A service antenna transmits a signal to and receives a signal from a mobile station. A repeater filters and amplifies a signal between the two antennas. A polarization variation unit variably selects a polarization direction of at least one of the donor antenna and the service antenna in response to a detection signal of an isolation detector for detecting isolation between the two antennas. The isolation between the donor antenna and the service antenna can be sufficiently ensured.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: August 14, 2012
    Assignee: KMW Inc.
    Inventor: Young-Chan Moon
  • Patent number: 8232868
    Abstract: A radio frequency tag for a radio frequency identification system is provided that includes an antenna and a receiver coupled to the antenna. The receiver receives and demodulates a message received on at least one frequency. A retransmit controller receives the message, determines a retransmit status for the message, and if the retransmit status is positive, initiates retransmission of the message for reception by another radio tag.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: July 31, 2012
    Assignee: Axcess International, Inc.
    Inventor: Wayne E. Steeves
  • Patent number: 8195089
    Abstract: An apparatus and method for cooperative transmission in a multi-antenna relay wireless communication system are provided. A receiving end includes an estimator, a reader, a feedback unit and a detector. According to the present invention, the receiving end receives the signal from both the transmitting end and the relay station. Therefore, a reception gain is obtained and a high throughput can be ensured.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: June 5, 2012
    Assignees: Samsung Electronics Co., Ltd., New Jersey Institute of Technology
    Inventors: Dong-Ho Kim, Myeon-Kyun Cho, Yung-Soo Kim, Yeheskel Bar-Ness, Osvaldo Simeone, Nicola Varanese
  • Publication number: 20120064824
    Abstract: A frequency mixing apparatus includes a local oscillator, a signal distributor, a first frequency mixer and a second frequency mixer and a combiner. The signal distributor divides a signal generated from the local oscillator into two signals having a phase difference and outputs the two signals. The first frequency mixer has a first input port through which one of the two signals outputted through the signal distributor is inputted and a second input port connected to an RF signal. The a second frequency mixer has a first input port through which one of the two signals outputted through the signal distributor and a second input port is connected to a termination signal. The combiner combines signals respectively outputted from the first and second frequency mixers.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 15, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jin-Cheol JEONG, In-Bok Yom
  • Patent number: 8121540
    Abstract: A repeater system is supplied for providing wireless communications. In an example, a repeater system is supplied to receive user information with an antenna in a wireless signal at a first frequency and transfer the user information in an electrical signal at the first frequency. A frequency converter receives the user information in the electrical signal at the first frequency and transfers the user information in the electrical signal at a second frequency. A first coupler receives the user information in the electrical signal at the second frequency and transfers the user information in a capacitive signal. A second coupler receives the user information in the capacitive signal and transfers the user information in an electrical signal at the second frequency. A second frequency converter receives the user information in the electrical signal at the second frequency and transfers the user information in the electrical signal at the first frequency.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: February 21, 2012
    Assignee: Sprint Communications Company L.P.
    Inventors: Harold Wayne Johnson, Mohan R. Tammisetti, David L. Harris
  • Patent number: 8095067
    Abstract: A frequency translating repeater (120) for use in a time division duplex (TDD) radio protocol communications system includes local oscillator (LO) circuits (210, 310, and 410) to facilitate repeating by providing isolation, reduced phase noise, reduced pulling, and the like. Tunable LOs (441, 442) can be directly coupled to down-converters (413, 414) and up-converters (426, 427) for increased isolation, reduced phase noise, less stringent frequency accuracy, and a reduced potential for pulling.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: January 10, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Kenneth M. Gainey, Kevin Negus, James C. Otto, James A. Proctor, Jr.
  • Patent number: 8090315
    Abstract: Aspects of a method and system for frequency control in a frequency shifting repeater are provided. In this regard, a reference frequency may be divided to generate a first pair of local oscillator (LO) signals, the first pair of LO signals may be divided to generate a second pair of LO signals. The two pairs of LO signals may be utilized to frequency shift a received signal for repeating the signal on a different frequency. The frequency shifted signal may be generated by down-converting the received signal utilizing the first pair of LO signals, up-converting the down-converted signal utilizing the second pair of LO signals, and combining the resulting up-converted signals. The reference frequency may be divided by a first scaling factor to generate the first pair of LO signal which, in turn, may be divided by a second scaling factor to generate the second pair of LO signals.
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: January 3, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8090314
    Abstract: Aspects of a method and system for communicating via a frequency shifting repeater are provided. In this regard, a signal having a first frequency may be received, the received signal may be quadrature down-converted by mixing it with a pair of phase-quadrature local oscillator (LO) signals, the down-converted signals may be up-converted by mixing them with the LO signals, and the up-converted signals may be added or subtracted to generate a signal, having a second frequency, for transmission. In this manner, a wireless communication range may be extended by repeating the received signal on a different frequency than at which it was received. The frequency of the LO signals may be based on a desired difference between the first and second frequencies, a frequency at which a target device receives signals, and/or noise present.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: January 3, 2012
    Assignee: Broadcom Corporation
    Inventor: Ahmadreza Rofougaran
  • Patent number: 8086170
    Abstract: An outdoor satellite receiving unit (ODU) receives several independent satellite signals, selects two signals with a switch matrix, downconverts the two signals to a bandstacked signal with a high and a low band signal, and outputs the bandstacked signal on the same cable to receiver units. Several satellite signals can be selected in groups of two or more and output to independent receiver units. Signal selecting is performed at the received radio frequency (RF) and bandstacking is performed with a single downconversion step to an intermediate frequency (IF). Channel stacking on the same cable of more than two channels from several satellites can be achieved by using frequency agile downconverters and bandpass filters prior to combining at the IF output. A slow transitioning switch minimizes signal disturbances when switching and maintains input impedance at a constant value.
    Type: Grant
    Filed: January 19, 2008
    Date of Patent: December 27, 2011
    Assignee: RF Magic, Inc.
    Inventors: Branislav Petrovic, Dale Hancock, Jeremy Goldblatt, Keith Bargroff
  • Patent number: 8081924
    Abstract: Partner relay systems and methods are provided in which relaying is performed by a pair of partner relays. Signals received from a base station are translated by a first of the pair of partner relays to a different transmission resource for communication between the pair of partner relays, and then upon reception by a second of the pair of partner relays, the signal is translated back to the original transmission resource and re-transmitted towards the receiver.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: December 20, 2011
    Assignee: Rockstar Bidco, LP
    Inventors: David Falconer, Shalini Periyalwar, Koon Hoo Teo, Mo-Han Fong
  • Publication number: 20110275313
    Abstract: A dynamic frequency translating repeater operating in a mobile communications system is operable to receive a multi-user signal and perform time-varying and user-specific frequency shifting in the repeater signal. The dynamic frequency translating repeater may further perform user subcarrier specific dynamic frequency translation. Different mobile stations may be allocated different frequency shift amounts based on the interference environments, resource allocations, and scheduling constraints particular to each mobile station.
    Type: Application
    Filed: January 19, 2009
    Publication date: November 10, 2011
    Inventors: Robert Baldemair, PƤl Frenger, Niklas Johansson, Peter Larsson
  • Patent number: 8055188
    Abstract: A structure of a data frame for transmitting data via a relay, and a transmission apparatus and a relay using the data frame are provided. The relay includes: a receiver to receive, from a transmission apparatus, first radio resource allocation information with respect to a first radio resource and second radio resource allocation information with respect to a second radio resource, and to receive first data from the transmission apparatus using the first radio resource allocation information; and a transmitter to transmit the received first data to a receiving apparatus using the second radio resource allocation information.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: November 8, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Rakesh Taori, Young-Doo Kim, Sung Jin Kim, Mi-Sun Do
  • Patent number: 8018914
    Abstract: A demodulation section 13 receives a TDMA-TDD based phase-modulated burst signal of mobile communications and demodulates the burst signal by a synchronous detection system (or a quasi-synchronous detection system). The demodulation section 13 includes a frequency deviation compensation section and a carrier recovery section each having a loop filter 14 with three or more stages of time constants. The time constants are switched by a selector switch 15 based on a control signal from a demodulation control section 16. This achieves quick pull-in and jitter after convergence is minimized, thereby allowing highly efficient performance of frequency deviation compensation, etc. that is required for synchronous detection (or quasi-synchronous detection) without increasing the size of circuit.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: September 13, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventor: Taisei Suemitsu
  • Patent number: 7962095
    Abstract: Partner relay systems and methods are provided in which relaying is performed by a pair of partner relays. Signals received from a base station are translated by a first of the pair of partner relays to a different transmission resource for communication between the pair of partner relays, and then upon reception by a second of the pair of partner relays, the signal is translated back to the original transmission resource and re-transmitted towards the receiver.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: June 14, 2011
    Assignee: Nortel Networks Limited
    Inventors: Shalini Periyalwar, Koon Hoo Teo, Mo-Han Fong, David Falconer
  • Publication number: 20110105018
    Abstract: A harmonic rejection mixer for carrying out a frequency translation of a mixer input signal having a mixer input frequency, the mixer including an up-conversion mixer for generating an intermediate signal by multiplying the mixer input signal with a first local oscillation signal having a first local oscillation frequency, and a down-conversion mixer for generating a mixer output signal by multiplying the intermediate signal with a second local oscillation signal having a second local oscillation frequency. The first local oscillation frequency and the second local oscillation frequency are greater than the mixer input frequency. The first local oscillation signal is an l-time oversampled sine wave and the second local oscillation signal is an m-time oversampled sine wave.
    Type: Application
    Filed: October 30, 2009
    Publication date: May 5, 2011
    Applicant: STMICROELECTRONICS DESIGN & APPLICATION GMBH
    Inventors: Sebastian Zeller, Peter Kirchlechner, Martin Frey
  • Patent number: 7925208
    Abstract: A payload design for a multi-spot-beam satellite communication system includes a plurality of uplink spot beam receivers and downlink spot beam transmitters, and a broadcast transmitting subsystem capable of transmitting a broadcast beam to an entire system geographical service area. An input filter-switch-matrix (IFSM) controllably selects input IF signal bands for routing to an on-board digital signal processor-router (DSPR). The DSPR subsequently routes all received point-to-point and broadcast data packets to the appropriate downlink spot or broadcast transmitting subsystems for transmission thereof. The broadcast downlink allows broadcast transmissions to occur at the highest efficiency possible, while also allowing for flexible provision of surge capacity for point-to-point transmissions on previously exhausted spot beams by selective use of the broadcast beam for such point-to-point transmissions.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: April 12, 2011
    Assignee: The DIRECTV Group, Inc.
    Inventors: Jamal Sarraf, Edward J. Fitzpatrick, James E. Justiss, Remberto Martin, Michelle J. Glaser-Weiner
  • Patent number: 7869760
    Abstract: A radio communication device capable of lightening the influence of a frequency selective fading in the wide-band transmission of a single carrier thereby to prevent deterioration of error rate characteristics. In this device, an FFT unit (13) subjects a modulated signal inputted from a modulation unit (12) to a Fourier transformation. A pilot insertion unit (14) inserts a pilot symbol into a plurality of individual frequency components (1-N) of the modulated signal. Weight multiplication units (15-1, 15-2) multiply the individual frequency components (1-N) and the pilot symbols inserted into the individual frequency components (1-N), by weight coefficients (W11-W1N, W21-W2N) set at a weight coefficient setting unit (54). IFFT units (16-1, 16-2) subject the frequency components (1-N) to an inverse Fourier transformation, thereby to convert the frequency components (1-N) into time domains.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: January 11, 2011
    Assignee: Panasonic Corporation
    Inventor: Akihiko Nishio
  • Patent number: 7831203
    Abstract: The present invention relates to a Radio Frequency Repeater to prevent oscillation with canceling a feedback interference signal between transmitting and receiving antenna with built-in transmitting and receiving antenna in wireless mobile communication repeater. A radio frequency repeater for canceling a feedback interference signal has a downlink path from a base station to a terminal and an uplink path from a terminal to a base station, and said downlink path and said uplink path is separated and combination by a duplexer.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: November 9, 2010
    Assignee: RF Window Co. Ltd
    Inventors: Seong Jae Lee, Mi Ja Lee, Chang Soon Kim, Hyeong Soo Choi
  • Patent number: 7773030
    Abstract: A method and system for antenna training for communication of multiple parallel data streams between multiple-input multiple-output communication stations is provided. An implementation involves performing antenna training by obtaining optimal antenna training coefficients by multi-stage iteration in estimating the multi-dimensional beamforming coefficients.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: August 10, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Pengfei Xia, Chiu Ngo
  • Patent number: 7756473
    Abstract: Provided are an on-channel repeater and a method thereof. The repeater receives signals on one channel and distributes the signals on the same channel by converting RF signals from a main transmitter into baseband signals; equalizing them in a high-performance equalizer, adding a repeater identifier to them; modulating the baseband signals with the repeater identifier into RF signals. The repeater includes: a receiver for receiving RF signals; a demodulator for demodulating the RF signals into baseband signals; an equalizer for equalizing the baseband signals; an adder for adding a repeater identifier to the baseband signals; a modulator for modulating the baseband signals with the repeater identifier added in the adder into RF signals; and a transmitter for transmitting the RF signals modulated in the modulator. The technology of the present invention is used to form an on-channel repeating network in an arbitrary transmission system including a digital television broadcasting system.
    Type: Grant
    Filed: December 31, 2004
    Date of Patent: July 13, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae-Hyun Seo, Yong-Tae Lee, Heung-Mook Kim, Ho-Min Eum, Sung-Ik Park, Seung-Won Kim, Soo-In Lee
  • Patent number: 7738836
    Abstract: A novel system and method for a network overlay geolocation system operating in a host wireless communication system with repeaters is disclosed. Embodiments of the novel system and method enable a wireless communication system to determine if signals being received by system receivers arrive directly from a target mobile appliance or if the signals are passing through or via a repeater. In an embodiment, the system's repeaters use a co-channel AM Golay Hadamard sequence multiplied by an uplink signal to watermark the repeated signal. The system uses the known AM Golay Hadamard sequences of the repeaters and the waveform of the received uplink signal to detect whether a repeater has operated on the signal and which repeater operated on the uplink signal. Embodiments of the novel system and method provide system management data and can be used to provide more accurate geolocation of mobiles served by repeater stations.
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: June 15, 2010
    Assignee: Andrew Corporation
    Inventors: Martin Alles, Joseph P. Kennedy, Jr., John Peter Carlson
  • Patent number: 7565140
    Abstract: Embodiments of the present invention provide a method, apparatus and system of processing received wireless signals. The apparatus, according to some demonstrative embodiments of the invention, may include a network interface configured to convert the received wireless signals into output signals to be provided to a host processor, the network interface having a first mode of operation, in which the output signals have base-band values corresponding to base-band values of the received signals, and a second mode of operation, in which the output signals have values representing a data frame of the received signals. Other embodiments are described and claimed.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: July 21, 2009
    Assignee: Intel Corporation
    Inventors: Shmuel Levy, Shmuel Ravid, Gal Basson